Zeppelin Flights. 1925 (May 8-10), Airship Los Angeles Return Flight cover from San Juan to Lakehurst to Cleveland, franked by Franklin 3c green in vertical imperforated pair, red three-line confirmation cachet, postmarked on reverse, F/VF, Sieger #20W, €250, Est. $130-$160 (Image)

Zeppelin Flights. 1930 (June 3-6), 1st Europe - Pan America Round Flight postcard, delivered on legs Lakehurst-Seville, Seville- Friedrichshafen, franked by Zeppelin stamp of 65c green, red German and violet American confirmation markings, Friedrichshafen ''6.6.30'' arrival, the card returned to US by ship on June 18 (green Zeppelin marking is alongside at the bottom), VF, Sieger #64A, Est. $100-$150 (Image)

Zeppelin Flights. 1933 (October 23-November 2), Century of Progress Flight, three US covers on legs Miami - Chicago, Chicago - Friedrichshafen and Akron (second landing) - Friedrichshafen, each one franked by ''Baby'' Zeppelin 50c green, each one with appropriate markings and arrival ds, mostly VF, Est. $150-$200 (Image)